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Subject: Re: Ada Popularity: Comparison of Ada/Charles with C++ STL (and Perl)
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From: Matthew Heaney <matthewjheaney@earthlink.net>
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Date: 2004-10-02T13:40:22+00:00
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slatyb@yahoo.com (K) writes:

> Because it makes an enormous difference in the cost of developing and
> maintaining code.  It's much easier to write and maintain a table like
> this:
> 
>    dbmap<Order> order_map;
> 
>    order_map.insert("ORDER.NUMBER", &Order::number)
>              .insert("ORDER.CUSTOMER", &Order::customer_number)
>              .insert("ORDER.ACCEPTED", &Order::acceptance_date)
>              .insert("ORDER.PROMISED", &Order::promised_ship_date)
>              ...

   procedure Insert
     (Map     : in out Map_T;
      Key     : in String;
      Process : not null access
        function (Order : access Order_T) return Integer);

declare
   M : Map_T;
begin
   M.Insert ("ORDER.NUMBER", Number'Access);
   M.Insert ("ORDER.CUSTOMER", Customer_Number'Access);
   ...